#include <stdio.h>
#define STR4 "hello, dear!!"
#define LENGTH 10   
#define WIDTH  5
#define NEWLINE '\n'
void define(void);
void const_demo(void);

int main()
{
    char str1[] = "hello, dear";

    char str2[] = "hello, \
 dear";

    char str3[] = "hello, "
                  "d"
                  "ear";
    printf("str1:%s \n",str1);
    printf("str2:%s \n",str2);
    printf("str3:%s \n",str3);
    printf("str4:%s \n",STR4);
    define();
    const_demo();
    return 0;
}
void define(void){
    int area;  
  
   area = LENGTH * WIDTH;
   printf("value of area : %d \n", area);
   printf("%c", NEWLINE);
}
void const_demo(void){
   const int  LENGTH1 = 10;
   const int  WIDTH1  = 5;
   const char NEWLINE1 = '\n';
   int area;  
   
   area = LENGTH1 * WIDTH1;
   printf("const_demo value of area : %d", area);
   printf("%c", NEWLINE1);
}